... or someone like him.
My grade-school teacher said that electricity was "magic" to her, so my grounding in the subject might not be quite the greatest. As I recall, however, there are these things called "electrons" that zip around in those wires. And the big cans are filled with electron grease. Every once in a while, the grease runs low, the electrons slow down, and you notice the lights getting dim. Then this guy has to come around and refill the cans. I think that's it....